Therapeutical lamp



Jan. 5 9 1926.

F. W. -ROBBNSON ET AL THERAPEUTICAL' LAMP Filed Feb. 1, 1924 2 sheets-sheet 1 if 252 wwwa@ ATTORNEY Jam.4 5 1926.7 l'95689345 l 1F. w. RoBlNsoN ET A1..

THERAPEUTICAL LAMP Filed Feb, l, 1924 2 Sheets-Sheet 2 INVE TR f%M@%/W ATTORNEY place,

whereby Patented Jan. 5, 1926. l

FREDERIC W. ROBINSON AND KENNETH V. KNAPP, 0F NEWARK, NEW JERSEY, AS-

SIGNORS T0 HANOVIA CHEMICAL AND MFG'. CO., OF NEWARK, NEW JERSEY, A.

CORPORATION OF NEW JERSEY.

THERAPEUTICAL LAMP.

Application filed February 1, 1924. Serial No. 889,859.

To all whom, t may concern.'

Be it known that we, FREDERIC W. ROBIN- SON and KENNETH V. KNAPP, both citizens of the United States, and residents of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Therapeutical Lamps, of which the following is a speciiication.

This invention relates to electric lamps and more particularly to types used for therapeutical and like purposes.

The principal object of the invention is to provide a lamp in which the light is caused y an electric arc within a vacuum .tube containing mercury.

Another purpose is to produce a bi-lobed or tri-lobed tube composed of quartz glass, its upper portion, in which the arc takes being encased in a transparent envelope provided with adequate reflecting surfaces except at the front, each lobe being independently connected with one of the lead-in terminals of an electric circuit.

A further aim is in the provision of a lens carrying, hollow head in which the lamp elements are iixedly engaged, means being provided for maneuvering the lamp head in any desired manner.

A still further object is to provide means a circulation of water throughout the lamp may be had, reducing the temperature raised by the electric arc, preventing damage by overheating and being conducive to the best attainable results.

These and other analogous aims, objects and purposes, are accomplished by the novel construction, combination and arrangement of parts hereafter described and shown in the accompanying drawings forming part hereof and in which:-

`Figure 1 is a perspective view of a made in accordance with the invention, indicating the manner in which it may be maneuvered.

' Figure 2 is a face view of the lamp head, the front casing being removed.

Figure 3 is a transverse sectional view taken on line 3-3 of Fi re 4.

Figure 4 is a. longitu inal sectional view taken through the center of the completely assembled lamp in a plane indicated by the line 4-4 of Figure 2.

`ing turned lamp Figure 5 is a rear elevational view of the lamp head drawn to an enlarged scale.

Figure 6 is a perspective view of the water guard looking from the inner side thereof.

Figure 7 is a longitudinal sectional view of one of the lower members of the vacuum tube, showing the electrical connections and drawn to an enlarged scale.

Referring more in detail to the drawings, the numeral 10 designates the rearwardly extending, hollow body portion of thelamp head, the same being substantially elliptical in cross section, its major axis being horizontal when the lamp is in normal position.

On the lower side of this elliptical body is a thickened rib 11 blending into a downturned elbow 12 at its rear end, joined by a bridge 13 with the main body 10 which has at its rear end asubstantially circular pad 14 presenting a smooth outer face 15.

An arm 16 joining the body extends from the pad 14, opposite the rib 11, the arm beforwardly at a right angle, as at 17, parallel to the body 10 and spaced there above to permit the entrance of an opera.- tors hand in manipulating the lamp.

The forward end of the arm is integral with the wall 18 at the front end of the body 10 and constitutes the rear element of a. shallow, essentially rectangular chamber 19, from the side and end walls, respectively 20 and 21, of which extend undercut projections 22 and 23 Suited to receive and retain a rubber gasket 24.

Guided by these projections and seated on the gasket is an outer casing 25 having thickened corners 26 to receive clamp screws 27 passing through openings 28 in the plate or wall 18, the construction being such as to form an impervious joint.

The outer wall 29 of the casing has on its upper portion a screw threaded annular extension 30, having a recess in its outer edge to receive a packing ring 31 against which is seated a lens 32, clamped by a ring 33 engading the annular extension.

ecured to the pad face 15 is a cap 34 having flanged lugs 35 through which pass screws 36, the cap having -a central opening 37 in its outer member and an interior key 38 extends throughout its length.

Disposed in the cap, below the opening 37, is a thin dielectric disc 39, adjacent to which i made of quartz glass and enclosing a vacuum, is formed with three pendant lobes 51, 52 and 53, the same facing the lens 32 midway in the chamber 19 and casing 25, these lobes being bent at right angles to extend rearwardly as shown in Fig. 4.

At points just above the bends, the vacuum container 50 and communicating lobes are encased in an outer vacuum chamber 54, fused hermetically at its joint with the several lobes andcovered exteriorly, except at the front and bottom, with a highly polished silver casing 55 or an equivalent reflector of' suitable high grade.y v

The rear ends of lthe lobes are contracted to formV cones, as at 56, open at their ends and fused to the lobes over the cones are tubes 57, contracted near their opposite ends,

as at 58, the contracted portions containing f a tapered socket 59, its larger, outer end leading to a recess 60.

Flexible wires 61, from each of the terminals 41, 42 and 43 respectively, are brazed or permanently connected with rods 62 passing into the tubes and provided with 1ntegral conical elements 63 tightly fitting the tapered sockets 59 and extending from the cones are rod conductors 64, central of the tubes and having their extremities disposed within the cones 56 of the lobes.

Rubber tubes or like insulators 65 cover the conductors leading from the terminals 41, 42 and 43 to each of the cones 63 and the ends of the tubes are sealed by a small quantity of mercury 66 held in the space 60 by a suitable cement 67.

The lobes and tubes are partially filled with mercury and are firmly held within an opening 70 extending longitudinally through the body 10 by being embedded in a pitchy substance 71', as asphalt or bitumen, the outer end of the opening being first plugged with fire clay or jlike granular hard setting substance 72, after the vacuum tubes have been adjusted in place.

Thereafter the itch 71 is filled in, capped by a rubber diap ragm or dam 73 and the remainder of the opening filled with plaster lof Paris 74 or similar material when in a plastic state, sealing the tubes in the body 10. The action ofthe electric current on the mercury within the vacuum tube element 50 is such as to produce an efi'ulgence of violet colored raysof strong actinic power, which are directed outwardly through the lens 32 in a manner well known to the art.

Such operation engenders a high temperature, necessitating cooling the interior of the lamp chamber as a matter of safety for the delicate parts therein. l

To this purpose water is causedto circulate through the lamp head, entering by a flexible pipe 75 connected to a short metal tube 7 6 fixed in the outer end of' one of' a pair of parallel passages 77, cored through the body elements 11 and .12 and out of the tube 78 against the inner surface 79 of a raised portion of a baflle plate 80.

This battle is essentially L shaped, provided With flanges 81 at its side edges to seat against the wall 18 to which it is heldLby screws 82 passing through openings 83 in the balile to engage lugs 84 on the inner surface of' the wall, the baflie being open at its upper edge 85 to permit the water to pass outwardly into the chamber, formed by the elements 19 and 26, in direct contact with the outer vauuum chamber 54, eventually escaping through the opening 86 in the balile to enter return tubes, passages and pipes, duplicates of and side by side with the elements 75 to 78 inclusive, and leading to any convenient place for discharging the water.

By a proper control of a water supply under a suitable head or pressure, it will be apparent that the temperature in the lamp head can be regulated to suit.

The weight of the lamp head is preferably supported, in whole or in part, by a clip 90 carried-at the end of a'flexible cord 91 which may be spring or weight tensioned to suit, and in order to prevent the clip from slipping along the handle element 17 to which it is preferably engaged,'notches 92 may be formed therein, adjacent the plate 18.

lVhile the lamp may be maneuvered by grasping the handle 17, as indicated by the broken lines in lFigure 1, it may be considered preferable to grasp the body 10 in the palm of the hand, as shown by the full lines in the same ligure, something in the manner of handling a pistol or hand gun, the index linger pointing forward in directing the light as desired.

VAs changes in construction could be made within the scope of the invention, it is intended that all matter contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is

1. A vacuum chamber for an electric arc lamp comprising a hollow transparent body having lobes, said lobes being bent at right angles near their lower ends and terminating in hollow truncated cones, tubular extensions fused to As'aid lobes into which said cones enter said extensions being in spaced arallel relation and of equal length, said obes and extensions lcontaining mercury, and one of the terminals from an electnc circuit in each extension, said terminals'being centered by said cones and sealed in the extensions in contact with the mercury.

2. A vacuum chamber for an electric arc lamp comprising a hollow transparent body composed of quartz glass and havin lobes, said lobes being bent at points uni orm in their length to extend atjright angles in spaced parallel relation as tu es, said lobes being partially `filled with mercury, bar con ductors in each tube in contact with the mercury therein and means in said tubes for centering said conductors remote from the sealing point. v

'3. A vacuum chamber for an electric arc -lamp com rising a hollow transparent horizontal bo y having pendant lobes, a second -body including the upper vacuum amber spacedly enclosing the ortions of its lobes, said second chamber tially rectangular and having interior reecting walls opaque except at the front,

'tubes communicating with said lobes extendin at -right angles rearwardly therefrom, said vtubes and lobes containing .mercury, and terminals sealed in said tubes-in contact with the mercury therein, both of said chambers, the lobes and tubes being composed exclusively of quartz glass.

4. A vacuum chamber for an electric arc lamp comprising a hollow transparent lobed body composed wholly of quartz glass, a second vacuum chamber also of quartz glass spacedly enclosing the lobed body including e upper portions of its lobes, a reflector surrounding the top, sides and rear of said chamber, merc" filled tubes in communication with said obesz and terminals in elecing substanbody composed of quartz glass, an outer vacuum chamber spacedly enclosing said body, the chamber being also composed of quartz glass, a reflector associated with said outer chamber, tub communicating with the lobes of said body, said tubes extending at right angles thereto and being filled with mercury, electrical connections engaging with the mercu in said tubes and means formed on. saidrlobes to receiveand center said connections. i g

6. A vacuum chamber for an electric arc lamp comprising a hollow transparent lobed body composed of quartz glass, an outer vacuum chamber spacedly enclosing said body, a reflector associated with said outer chamber, ada ted to project light rays outwardly, para el tubes in open communication with the lobes of said body, said tubes being normally horizontal and filled with mercury, a casing for said tubes, a plastic substance in said casing in which the tubes are embedded, and means for conveying an electrical current to the mercury.

7. A vacuum chamber for an electric arc lamp comprising a hollow transparent lobed body composed of quartz glass, a second vacuum chamber spacedly enclosing the lobed body including the upper portions of its lobes, tubes communicating with said lobes extending rearwardly, said tubes and lobes containing mercury, rods sealed in said tubes for conducting an electric current to the mercury, and cones on the ends of said lobes having openings receptive of the ends of said rods and by which they are guided.

8. A vacuum chamber for an electric arc lamp comprising a hollow transparent body composed of quartz glass and havin lobes, said lobes being bent at points uni orm in their length to extend at right an les in spaced parallel relation as tubes, sai lobes being artial-lv filled with mercury, conduc tor ro s, means for sealing said rods in the ends of said lobes, and means for supporting the inner ends of said rods.

This specification signed and witn---w-4 this 28th day of January 1924.

. FREDERIC-w. ROBINSON. KENNETH V. KNAPP. 

